c12d1922c105cda03a6c3bfa703244dee95b59cf84078a634f4c321abcb21c53

Analysis

max time kernel
149s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 19:24

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General

Target

2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe
Size

71KB
MD5

1d58a33157321d1623c13c062eaa75c7
SHA1

817f3fece336c1f26014cd69ee62ef516fecd37a
SHA256

c12d1922c105cda03a6c3bfa703244dee95b59cf84078a634f4c321abcb21c53
SHA512

d444e8d4765be23d5306b82d8c25841a2b5cb35aa561d94136c3a858719dca3ddf02eb3789b08453958f046b3c51eb794389ed512d37685832930647ecfbe2bc
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTYw:ZhpAyazIlyazTYw

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2636 CTS.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

pid	process
2636	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CTS.exe2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2620 2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe
Token: SeDebugPrivilege 2636 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2620	2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe
Token: SeDebugPrivilege	2636	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe

description	pid	process	target process
PID 2620 wrote to memory of 2636	2620	2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe	CTS.exe
PID 2620 wrote to memory of 2636	2620	2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe	CTS.exe
PID 2620 wrote to memory of 2636	2620	2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_1d58a33157321d1623c13c062eaa75c7_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2620

C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:2636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
392KB

MD5
b30c65a3d6eb2862cbfbb047e7e9cde7

SHA1
0da49b9abe8accb72485c5f0509cb7411ad227cc

SHA256
a0ee53cfec53a39d6bc39b371aca52572135c356d6ab0e30eac6d7b7a489297c

SHA512
e34d0e1dc9ec3f833823df36d8d92503e78215440509f56fd421d29e918d78f931b14752a62ae71b1738d93351987f5e3a9c39972689a370d362694b8f628a02

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C:\Users\Admin\AppData\Local\Temp\rvWesAE3CfNItKW.exe

Filesize
71KB

MD5
15ceea315b8895e90a7991356cec5791

SHA1
a065b4c42857d93084661e81dccbe987050411d0

SHA256
0c708d2a53835bd47c1ca3e803f31e4dfc174c97bfc87fbd9821a9d1b9ed0c1d

SHA512
711e86534c0d752cbdc60aeb614fc62103e3cb3cd489865c9ff118d8268cde6f2a803616605af19f31fe2630e40d6e11e6f1eeeb17460b02e355c7e76b48f3c7

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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